the bell____the end of period rang and we had to stop our discussion.A.indicating B.indicated C.to be indicated D.being indicated解释下为什么选A,顺便解释一下这句的意思

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the bell____the end of period rang and we had to stop our discussion.A.indicating B.indicated C.to be indicated D.being indicated解释下为什么选A,顺便解释一下这句的意思
the bell____the end of period rang and we had to stop our discussion.
A.indicating B.indicated C.to be indicated D.being indicated
解释下为什么选A,顺便解释一下这句的意思

the bell____the end of period rang and we had to stop our discussion.A.indicating B.indicated C.to be indicated D.being indicated解释下为什么选A,顺便解释一下这句的意思
意思是:代表这段时期结束的铃声响了,我们不得不停止我们的讨论.
这句话中and 连接两个句子,and前面的句子主语为the bell indicating the end of period,动词是rang.indicating the end of period 修饰the bell..一个单句不可能有两个主谓,又因为“铃声”和“预示”是主动关系,所以indicate要用现在分词形式indicating.而不能用表被动的indicated .